M2 Competition

BMW M2 Competiton

WG Motorworks Tuning Guide

The M2 Competition uses a completely new power plant in the M Performance fettled 2 Series chassis, the car is equipped with the S55 engine, which is also found in the F series M3 / M4. Essentially running in the same configuration aside from some emissions-related exhaust restricting filters, known as GPF / PPF (Gasoline / Petrol Particulate Filter).  Punching 410HP from a 3.0 Twin-turbo straight-six direct injection engine. In Standard form the M2c is no slouch….. however, most owners will notice the power goes flat over 5500rpm (as shown in the power graph in green). This power curve is resolved with a simple software upgrade, where outputs of 500HP can be achieved.

Overall the S55 engine is a strong power unit, matched with a DCT gearbox that is proven to handle in excess of 600-700HP in standard form,  if using for the track we would recommend some additional cooling packages to ensure temperatures are kept in check.

The main weak link on the S55 has been found, this is related to the crankshaft to timing gear attachment - more specifically the use of a flange that relies purely on bolt torque pressure to attach the timing chain bottom pulley to the crankshaft without a keyway or dowel. This can 'slip' with aggressive downshifts / high torque numbers. We can offer a capture plate that helps to prevent this from occurring, however there is no guarantee that is a permanent fix. For those running big power and looking for a more assured ‘fix’ there is a complete solution that involves replacing the bottom pulley with a doweled crank hub. More information can be found here

For some owners the crank hub full fix is not a cost-effective solution, not to worry we have you covered! We can offer 'Crank hub friendly tunes' where we heavily limit the torque output, even down to stock if required, but build the power up in the upper RPM, to create a perfectly flat torque curve while increasing HP dramatically past 4500rpm

S55 Engine ECU tuning can be offered across two options, our standard tune with its proven calibrations - which have been Dyno, Track, and also importantly Road tested. Alternatively, and preferably we can offer ECUTEK Racerom software which allows us to enhance more aspects of the engine including on the fly map switching features, rolling anti-lag while allowing the end-user to adjust certain parameters with a Bluetooth device with phone APP

For the power hungry folk, or those who simply want to improve their soundtrack - plenty of upgrades can be offered from MOT legal exhaust systems and full track system (not road legal), along with Hybrid turbo chargers and engine cooling upgrades. Click here for Performance Upgrades

For those Track Addicts, Nurburgring goers or simply for those who have increased their power and want a chassis to match, we can offer simple upgrades from high performance pads / brake lines to full  suspension coilover systems, with various Roll bar and bush upgrades. Click here for Chassis Upgrades

Stage 1

The first step with extracting power from the S55 engine requires no hardware changes, this is software only upgrade. The main objective was to keep the power climbing nearer to the rev limiter rather than flattening off like standard, along with increasing the torque levels while following a similar power delivery to stock to avoid unnecessary torque spikes from the small twin turbo's. While retaining a safe AFR to ensure EGT / Catalyst temperatures are kept in check.

With our 'Stage 1' software upgrades the following features are included:

  • Vmax Removal (Speed limiter removed)
  • Sports Displays recalibrated to suit new outputs

Expected Results, based on our Dyno Dynamics rolling Road:

+80-100HP (490-510HP)
+ 70-90LBFT (510-530LBFT)

Stage 1+

The next step with extracting power on the M2c engine requires the removal of the OPF filters. With the option of either a simple bypass section or a complete cat back system.  Once the restrictive filters are removed not only will the exhaust note be much improved, but additional overrun can now be heard. GPF 'delete' software has to be installed to ensure no limp mode operation, and that all EML (Engine management lights) are eliminated for any GPF faults. With the hardware improvement we see gains closer to what the M3/ M4 would expect with stage 1 software.

With our 'Stage 1+' software upgrades the following features are included:

  • Vmax Removal (Speed limiter removed)
  • Sports Displays recalibrated to suit new outputs
  • GPF delete software
  • Enhanced overrun (Optional)
  • Cold start delete (removal of high / loud idle) (Optional)

Expected Results, based on our Dyno Dynamics rolling Road:

+100-120HP (510-530HP)
+ 80-100LBFT (520-540LBFT)

WGM Stage 1+ Tuning Package

Stage 2

The final step in maximizing the efficiency of the stock turbochargers is removing the catalyst in the downpipes, Total removal of the catalyst is recommended for Track use only as it is not MOT compliant. With the catless downpipes installed Fueling can be optimized and new lambda targets set, along with a  slight increase in boost and ignition timing taking into account the less restrictive exhaust system.

Standard cat back with or without GPF filters can be still retained, how ever optimal results are based on free flowing turbo back system. An uprated Charge cooler system is not a requirement, however gains can still be achieved by installing one.

With our 'Stage 2' software upgrades the following are included:

  • Vmax Removal (Speed limiter removed)
  • Sports Displays recalibrated to suit new outputs
  • Catalyst code removal to avoid EML lights
  • Cold start delete (removal of high / loud idle) (optional)
  • GPF delete software (If applicable)
  • Enhanced over run (Optional)

Expected Results, based on our Dyno Dynamics rolling Road:
+120-150HP (530-560HP)
+ 90-110LBFT (540-560LBFT)

WGM Stage 2 Tuning Package

Stage 3

The stock turbochargers are the limiting factor when it comes to the next stage of performance, with compressor / turbines limiting any more flow. With larger compressors and turbines installed into the stock turbo housings, these 'Hybrids' allow much greater mass air flow, and exhaust gas flow. High flow downpipes are must at this state of tune, and with a cat back system advised for optimal gains.

Charge temperatures start to creep up when increasing the boost pressures - so depending on target HP and usage we would advise a charge cooler upgrade as well.

Water Methanol would also be a recommended upgrade when looking for maximum output.

With our 'Stage 3' software upgrades the following are included:

  • Vmax Removal (Speed limiter removed)
  • Sports Displays recalibrated to suit new outputs
  • Catalyst code removal to avoid EML lights
  • Cold start delete (removal of high / loud idle) (optional)
  • GPF delete software (If applicable)
  • Enhanced over run (Optional)

Expected Results, based on our Dyno Dynamics rolling Road:
+190-290HP (600-700HP)
+ 100-150LBFT (570-620LBFT)

WGM Stage 3 Tuning Package

OUR SERVICES INCLUDE

Dyno Testing

All ECU remaps are carried out on our State of the Art Dyno Dynamics Dynotech rolling road, which can accurately read upto 1200HP

Data Logging

Each car is hooked up to a Wide band lambda sensor to ensure correct air to fuel ratio, along with data logging tools to ensure Boost, Ignition timing parameters are all in check

Diagnostic Check

We carry out a pre and post tuning ECU diagnostic trouble code check (DTC) to ensure no faults are present before or after tuning